Self closing hinge



FIG. 1 is a front perspective view;

FIG. 2 is a back perspective view;

FIG. 3 is a front view;

FIG. 4 is a back view;

FIG. 5 is a side view;

FIG. 6 is the other side view;

FIG. 7 is a top view; and,

FIG. 8 is a bottom view.

The broken lines in the drawing represent unclaimed environmental material. 

The ornamental design for a self closing hinge, as shown and described. 